Electric razor with detachable cutting head



June 20, 1967 M. M. A.-TROU|LHET 3,325,893

ELECTRIC RAZOR WITH DETACHABLE CUTTING HEAD Filed March 2, 1965 INVENTOP.

Mamas MARIE A-c/HLLE TROLIILHET Arm RNEYS United States Patent 3,325,893 ELECTRIC RAZOR wrrn DETACHABLE CUTTING HEAD Maurice Marie Achille Trouilhet, Lyon, France, assignor to Calor Appareiis Electro-Domestiques, Lyon, France, a corporation of France Filed Mar. 2, 1965, Ser. No. 436,554 Claims priority, application France, Mar. 6, 1964, 966,544 2 Claims. (Cl. 30-4392) cleaned completely unless its component elements are disassembled, which in practice can only be done by a specialist equipped with adequate tools. Such a work is not within the skill of an ordinary user who generally contents himself with a very incomplete cleaning involving a premature wear and tear of the cutting members.

The present invention has essentially for its object to avoid these drawbacks and is remarkable notably in that the cutting head according to the invention is carried by a support detachably mounted on the casing and that said head is provided with a cutter driving member adapted,

when said support is positioned on the casing, to engage a pin or like member connected to said motor whereby the assembly consisting of the cutting head and its supporting plate constitutes a detachable unit adapted to be removed from the casing to facilitate the cleaning of the razor.

The cutting head may thus be separated from the casing Without any disassembling step by effecting a very simple operation.

According to another feature of the invention, the aforesaid support consists of a plate provided with guide means and positioning means co-acting with corresponding means provided on the casing.

According to another feature of the invention, the aforesaid guide means consist of a pair of lateral flanges extending along two parallel opposite edges of said plate and adapted to slide long the side faces of a parallelepipedic projecting portion of the casing, said flanges being provided with notches engageable by studs or the like provided in said side faces so as to rigidly hold said plate on the casing.

Still in accordance with this invention the aforesaid support comprises in addition a locking member adapted to prevent the untimely sliding thereof with respect to the casing.

It will be seen that the present invention, while permitting an easy removal of the cutting head, affords a rigidly fastening of the cutting head on the casing, thus providing the best operating conditions for the razor.

Other features of the invention will appear as the following description proceeds.

In the attached drawings given by way of example only:

FIGURE 1 is a fragmentary perspective view showing a razor according to the invent-ion, with the cutting head removed from the casing;

FIGURE 2 is a fragmentary section taken along the line IIII (FIG. 1) showing the grid release system, and

FIGURE 3 is a view corresponding to FIGURE 2, the release system being shown in the position in which it releases said grid.

ting head is to be mounted.

The cutting head consists essentially of a supporting plate 3 of substantially rectangular configuration on which a slide 4 carrying the cutters 5 is adapted to be reciprocated. This slide 4 comprises a cavity 4a engageable by a driving pin or like member 6 rigid with the casing and driven in turn by the motor (not shown). An aperture 3a is formed in the plate 3 to permit the passage and movement of translation of said driving pin 6.

The plate 3 comprises along its lateral edges 3a a pair of flanges 7a, 7b obtained for example by cutting and folding the plate metal at right angles. These flanges constitute guide means adapted to fit over the two parallel side faces of a parallelepipedic projection 8 formed on the top of the casing 2, only one side face 8a being visible in FIGURE 1.

Each flange 7a and 7b is provided with a pair of notches 90, 9'0 and 9b, 9'b acting as anchoring ramps and engageable, when the plate 3 is caused to slide on projection 8, by studs as 100, 10a carried by each lateral side face of the aforesaid parallelepipedic projection 8.

The supporting plate 3 is also provided with a locking member consisting of an elastic tongue 11 co-acting with an inclined ramp 12 provided in a cavity 13 of said paral- 'lelepipedic projection 8.

The plate 3 carries at one of its ends a pair of lugs such as 14 acting as pivot means to a grid 15 whereby the latter can be tilted with respect to the plate for uncovering the cutters 5.

The grid 15 may be fastened to the plate 3 by means of an elastic tongue 16 provided on its front face 17. This tongue 16 is adapted in the closed position, to snap on a keeper or like projection 18- formed on the plate 3.

To permit the automatic opening of the grid there is provided on the front face 17 thereof an elastic member 19 of circular arc configuration which is adapted, when the cutting head is positioned on the casing, to engage a push-button 20 slidably mounted on the casing and responsive to a return spring 21 urging same way from the plate 22 on which it is adapted to slide.

When the cutting head is fitted on the casing and the grid is closed, i.e. with the tongue 16 snappily engaging the keeper 18, the elastic member 19 is closely adjacent to the upper inclined edge 20a of push button 20, as shown in FIGURE 2.

To fit the cutting head on the casing the user simply presents the head in a position to enable the driving pin 6 to engage the cavity 4a of slide 4, and the flanges 7a, 7b to fit on the side faces of projection 8. Then it is only necessary to cause the cutting head to slide in the direction of the arrow F so that the notches 9a, 9a and 9b, 9b engage the corresponding studs. At the same time, the elastic tongue 11 slides on the ramp 12 until it is shaped on the front edge 12a of this ramp 12.

Under these conditions it will be seen that the head is properly positioned and fastened on the casing due to the four notches engaging the four studs. With this four point fastening, the head is safely prevented from rocking with respect to the casing. On the other hand, the elastic tongue 11 holds the head in position and prevents same from sliding on the projection 8.

The presence of the flanges 7a, 7b which may be obtained for example by folding the marginal portions of the plate 3 at right angles as already suggested hereinabove is advantageous in that it imparts to this plate 3 a considerable rigidity and thus avoids any risk of distortion likely to cause a wedging when fitting this plate in posi- I13 tion. This rigidity also permits of reducing to a minimum the noise caused by the movement of slide 4 carrying the cutters 5.

To separate the head from the casing the user simply causes the former to slide in the direction of the arrow F2, the tongue 11, due to the shape of its end portion, thus escaping from the front edge 12a of ramp 12.

The push-button 20 permits of controlling the opening of the grid when the head is in position. In fact, by depressing this button in the direction of the arrow F3 (see FIGURE 2) against the resitance of spring 21, the grid assembly is raised by means of member 19, thus causing the tongue 16 to be released from the keeper 18.

Opening the grid without removing the cutting head permits of effecting a summary cleaning of the cutters.

The grid can be closed by means of a simple finger pressure to re-engage the tongue 16 over the keeper 18. Although the form of embodiment described relates to a cutting head provided with cutters driven for reciprocating motion it is obvious that the invention is also applicable to razors provided for example with rotary cutting members or to razors provided with grids of a type differing from that illustrated.

Of course, the invention is not limited by the specific form of embodiment described and illustrated which is given by way of example only.

What I claim is:

1. An electric razor comprising a casing having a parallelepipedic member projecting therefrom and provided with a rigid locking member, positioning means formed on two parallel side faces of said parallelepipedic member, a pin projecting above said parallalepipedic member and driven in movement, a supporting plate carrying a cutter head comprising movable cutters adapted to be driven by said pin and a grid coacting with said cutters, said supporting plate being formed with parallel lateral flanges provided to register with said faces and having positioning means adapted to snappily engage aforesaid positioning means, said supporting plate further comprising a deformable locking member adapted to coact with said rigid locking member when the positioning means on said lateral flanges engage the positioning means on said parallelepipedic member, whereby said supporting plate is rigidly held on said casing.

2. An electric razor according to claim 1 wherein said supporting plate comprises pivot means provided at one of its ends and a keeper member provided at its opposite end, said grid having one of its ends supported on said pivot means whereas its opposite end comprises an elastic tongue means adapted to engage said keeper member and a protruding member and wherein said casing comprises a movable button coacting with said protruding member to raise the latter, whereby the movement of said movable button causes said elastic tongue means to release from said keeper member.

References Cited UNITED STATES PATENTS 2,661,531 12/1953 Streng 30-41.6 2,758,370 8/1956 Gray et al. 30-43.92 2,793,430 5/1957 Carissirni 30-4332 2,844,869 7/1958 Kahn 30-43.92 2,930,119 3/1960 Kleinman 30-43.92 3,045,346 7/1962 Akerib 30-4392 3,056,198 10/1962 Ream 3043.1 3,105,298 10/1963 Carissimi 30-43.92 3,172,200 3/1965 Ream 30-43.1 3,191,298 6/1965 Locke 3043.92

WILLIAM FELDMAN, Primary Examiner.

MYRON C. KRUSE, Examiner. 

1. AN ELECTRIC RAZOR COMPRISING A CASING HAVING A PARALLELEPIPEDIC MEMBER PROJECTING THEREFROM AND PROVIDED WITH A RIGID LOCKING MEMBER, POSITIONING MEANS FORMED ON TWO PARALLEL SIDE FACES OF SAID PARALLELEPIPEDIC MEMBER, A PIN PROJECTING ABOVE SAID PARALLALEPIPEDIC MEMBER AND DRIVEN IN MOVEMENT, A SUPPORTING PLATE CARRYING A CUTTER HEAD COMPRISING MOVABLE CUTTERS ADAPTED TO BE DRIVEN BY SAID PIN AND A GRID COACTING WITH SAID CUTTERS, SAID SUPPORTING PLATE BEING FORMED WITH PARALLEL LATERAL FLANGES PROVIDED TO REGISTER WITH SAID FACES AND HAVING POSITIONING MEANS ADAPTED TO SNAPPILY ENGAGE AFORESAID POSITIONING MEANS, SAID SUPPORTING PLATE FURTHER COMPRISING A DEFORMABLE LOCKING MEMBER ADAPTED TO COACT WITH SAID RIGID LOCKING MEMBER WHEN THE POSITIONING MEANS ON SAID LATERAL FLANGES ENGAGE THE POSITIONING MEANS ON SAID PARALLELEPIPEDIC MEMBER, WHEREBY SAID SUPPORTIN PLATE IS RIGIDLY HELD ON SAID CASING. 